Anesthesia Technologist Practice Exam

Which of the following is true regarding Hemoglobin levels in an adult?

1. Normal levels range between 8 and 12 g/dL

2. Normal levels range between 14 and 18 g/dL

3. Normal levels should never drop below 14 g/dL

4. Normal levels are determined solely by hydration status

The correct answer is: Normal levels range between 14 and 18 g/dL

Normal hemoglobin levels in adults typically range between 14 and 18 g/dL for males and 12 to 16 g/dL for females. This range reflects the healthy oxygen-carrying capacity of the blood and is essential for adequate tissue perfusion and overall metabolic function. Option B specifically highlights the normal levels of hemoglobin for adults, which is crucial for understanding patient health and diagnosing potential anemias or other underlying conditions. Maintaining hemoglobin within this range is important as significant deviations can lead to symptoms of fatigue, weakness, or more serious complications due to insufficient oxygen delivery to tissues. The other options are misleading; the range presented in option A is actually below normal levels for the vast majority of adults, which could indicate a medical condition such as anemia. Option C suggests that levels should never drop below 14 g/dL, which is not accurate since individuals can have healthy hemoglobin levels below this mark, particularly women. Option D incorrectly states that hydration status solely determines normal hemoglobin levels; while hydration can influence hemoglobin concentration, many other factors such as nutrition, altitude, and underlying health conditions also play critical roles in determining hemoglobin concentration in the blood.